Their land also is full of {p} silver and gold, neither is there any end of their treasures; their land is also full of horses, neither is there any end of their chariots:

(p) The prophet first condemned their superstition and idolatry next their covetousness and thirdly their vain trust in worldly means.

Wesley's Notes

2:7 Treasures - They have heaped up riches, and still are greedily pursuing after more.

Jamieson-Fausset-Brown Bible Commentary

7. gold-forbidden to be heaped together (De 17:17). Solomon disobeyed (1Ki 10:21, 27).

horses . chariots-forbidden (De 17:16). But Solomon disobeyed (1Ki 20:26). Horses could be used effectively for war in the plains of Egypt; not so in the hilly Judea. God designed there should be as wide as possible a distinction between Israel and the Egyptians. He would have His people wholly dependent on Him, rather than on the ordinary means of warfare (Ps 20:7). Also horses were connected with idolatry (2Ki 23:11); hence His objection: so the transition to "idols" (Isa 2:8) is natural.

Matthew Henry's Concise Commentary

2:1-9 The calling of the Gentiles, the spread of the gospel, and that far more extensive preaching of it yet to come, are foretold. Let Christians strengthen one another, and support one another. It is God who teaches his people, by his word and Spirit. Christ promotes peace, as well as holiness. If all men were real Christians, there could be no war; but nothing answering to these expressions has yet taken place on the earth. Whatever others do, let us walk in the light of this peace. Let us remember that when true religion flourishes, men delight in going up to the house of the Lord, and in urging others to accompany them. Those are in danger who please themselves with strangers to God; for we soon learn to follow the ways of persons whose company we keep. It is not having silver and gold, horses and chariots, that displeases God, but depending upon them, as if we could not be safe, and easy, and happy without them, and could not but be so with them. Sin is a disgrace to the poorest and the lowest. And though lands called Christian are not full of idols, in the literal sense, are they not full of idolized riches? and are not men so busy about their gains and indulgences, that the Lord, his truths, and precepts, are forgotten or despised?